262 APPENDIX TO PART IV. 



at our request, thirty microscopic sections cut from the following numbers: i, 3, 6, 8, 

 10-12, 14, 16, 19-21, 23, 26, 29, 32, 44, 46, 49, 57, 62, 76, 79, 83, 128, 94, 96-98, 107, 

 126, 139, 164, 178, 179, 212, 217, 225, 240. Many of them have been figured in our 

 plates, and are further explained in a descriptive commentary accompanying the slides 

 and specimens purchased. 



Porpliyritic Gneiss. To this belong Nos. 105-109, and 149. It has been cut by 

 Nos. 7 and 14. 



Bethlehem Gneiss. Nos. 102, 103, iii, 112, 113, 119, 124, 126, 133, 196, 244, 218, 

 220. 



Lake Winnipiseogee Gneiss. Nos. 50, 52, 53, loi, no, 117, 118, 120, I2r, 122, 

 125, 127, 137, 206, 208, 250. It has been cut, probably, by No. 8. 



Montalban Groiip. Nos. 46-49, 51, 54, 55, 58-60, 114, 116, 123, 135, 139, 138, 145, 

 159, 160, 210, 237. 



The following intrusive rocks have cut this formation: Nos. 2, 6, 11-13, 19, 20, 22, 

 and 24. 



Franconia Breccia. Nos. 74 and Ti, with Nos. 72 and 'Ji for cement, cut by No. 15. 



Huronian (Hornblende schist). Nos. 217, 219, 221-226. 



Lisbon Group. Nos. 104, 128, 130, 132, 150, 151, 153, 184, 201, 211-216, 22S-231, 

 241 ; — cut by No. 10. 



Lytnan Gronp. Nos. 143, 144, 164-166, 168, 174, 183, 197-199, 242, 249;— cut by 

 Nos. 16, 17, 18. Swift Water series, 167; auriferous conglomerate, 236. 



Merrimack Groiip. Nos. 140, 204, 175. 



Ferruginous Slate Group. No. 240. 



Rockingham Group. Nos. 154, 45, 207. 



Kearsarge Andalusite Group. Nos. 134, 141, 146, 156-158, 163. 



Cambrian Slates. Nos. 99, 169-171, 173, 181, 182, 232, 234, 235, 239. 



CotJs Group (Quartzite of Vol. II). Nos. 186-188, 190-193, 200, 203. 



Mica Schist and Stanrolite Rocks. Nos. 136, 142, 147, 148, 161, 162, 172, 177, 

 178, 180, 189, 227, 243, 23S ; — cut by Nos. I and 9. 



Calciferous Mica Schist. Nos. 155 and 248. 



Helderberg. Nos. 152, 176, 205, 209, 245-247. 



To Conway granite are referred Nos. 62-65, 67, 8r, 82, 86; — cut by Nos. 4, 5, 25. 



Albany Granite. Nos. 39, 79, 86, 87, 88. 



Chocorua Granite. Nos. 76-78, 80, 90. 



Exeter Sienite. No. 71 ; other sienites, Nos. 95, 96, 85, 97. 



Pequaivket Breccia. Nos. 40-44. Granite cutting Cocis group, No. 57. 



